/* 初始化 */
a,
abbr,
acronym,
address,
applet,
area,
article,
aside,
audio,
b,
base,
basefont,
bdi,
bdo,
big,
blockquote,
body,
br,
button,
canvas,
caption,
center,
cite,
code,
col,
colgroup,
datalist,
dd,
del,
details,
dir,
div,
dfn,
dialog,
dl,
dt,
em,
embed,
fieldset,
figcaption,
figure,
font,
footer,
form,
frame,
frameset,
h1,
h2,
h3,
h4,
h5,
h6,
head,
header,
hr,
html,
i,
iframe,
img,
input,
ins,
isindex,
kbd,
keygen,
label,
legend,
li,
link,
map,
mark,
menu,
menuitem,
meta,
meter,
nav,
noscript,
object,
ol,
optgroup,
option,
output,
p,
param,
pre,
progress,
q,
rp,
rt,
ruby,
s,
samp,
script,
section,
select,
small,
source,
span,
strike,
strong,
style,
sub,
summary,
sup,
table,
tbody,
td,
textarea,
tfoot,
th,
thead,
time,
title,
tr,
track,
tt,
u,
ul,
var,
video,
wbr,
xmp {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    line-height: 1.5;
}

*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    line-height: 1.5;
}

img {
    display: inline-block;
    border: none;
}

dl,
li,
menu,
ol,
ul {
    list-style: none;
}

button,
input,
select,
textarea {
    outline: none;
    -webkit-appearance: none;
}
iframe{
	border: none;
}
a,
a:link,
a:visited,
a:hover,
a:active {
    text-decoration: none;
}
html,
body,
#app {
    margin: 0;
    padding: 0;
    height: 100vh;
	width: 100vw;
    position: relative;
}
:root {
	--root-menu-width: 64px;
}